Model No :SWT-A09 Specifications -Digital alcohol test with audible alert . -Quick response and resume . -Range: 0.00-0.19% BAC & 0.0-1.9g/l . -It can ensure your driver is safe. -Use 2 x "AAA" alkaline batteries. (NOT included) -Easy to use and Carries conveniently . -Auto power off . Package Content -1 x Alcohol tester. -1 x hangs the rope.